/* $NetBSD: cname_5.c,v 1.3.4.1 2024/02/29 12:34:41 martin Exp $ */ /* * Copyright (C) Internet Systems Consortium, Inc. ("ISC") * * SPDX-License-Identifier: MPL-2.0 * * This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, you can obtain one at https://mozilla.org/MPL/2.0/. * * See the COPYRIGHT file distributed with this work for additional * information regarding copyright ownership. */ #ifndef RDATA_GENERIC_CNAME_5_C #define RDATA_GENERIC_CNAME_5_C #define RRTYPE_CNAME_ATTRIBUTES \ (DNS_RDATATYPEATTR_EXCLUSIVE | DNS_RDATATYPEATTR_SINGLETON) static isc_result_t fromtext_cname(ARGS_FROMTEXT) { isc_token_t token; dns_name_t name; isc_buffer_t buffer; REQUIRE(type == dns_rdatatype_cname); UNUSED(type); UNUSED(rdclass); UNUSED(callbacks); RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string, false)); dns_name_init(&name, NULL); buffer_fromregion(&buffer, &token.value.as_region); if (origin == NULL) { origin = dns_rootname; } RETTOK(dns_name_fromtext(&name, &buffer, origin, options, target)); return (ISC_R_SUCCESS); } static isc_result_t totext_cname(ARGS_TOTEXT) { isc_region_t region; dns_name_t name; dns_name_t prefix; bool sub; REQUIRE(rdata->type == dns_rdatatype_cname); REQUIRE(rdata->length != 0); dns_name_init(&name, NULL); dns_name_init(&prefix, NULL); dns_rdata_toregion(rdata, ®ion); dns_name_fromregion(&name, ®ion); sub = name_prefix(&name, tctx->origin, &prefix); return (dns_name_totext(&prefix, sub, target)); } static isc_result_t fromwire_cname(ARGS_FROMWIRE) { dns_name_t name; REQUIRE(type == dns_rdatatype_cname); UNUSED(type); UNUSED(rdclass); dns_decompress_setmethods(dctx, DNS_COMPRESS_GLOBAL14); dns_name_init(&name, NULL); return (dns_name_fromwire(&name, source, dctx, options, target)); } static isc_result_t towire_cname(ARGS_TOWIRE) { dns_name_t name; dns_offsets_t offsets; isc_region_t region; REQUIRE(rdata->type == dns_rdatatype_cname); REQUIRE(rdata->length != 0); dns_compress_setmethods(cctx, DNS_COMPRESS_GLOBAL14); dns_name_init(&name, offsets); dns_rdata_toregion(rdata, ®ion); dns_name_fromregion(&name, ®ion); return (dns_name_towire(&name, cctx, target)); } static int compare_cname(ARGS_COMPARE) { dns_name_t name1; dns_name_t name2; isc_region_t region1; isc_region_t region2; REQUIRE(rdata1->type == rdata2->type); REQUIRE(rdata1->rdclass == rdata2->rdclass); REQUIRE(rdata1->type == dns_rdatatype_cname); REQUIRE(rdata1->length != 0); REQUIRE(rdata2->length != 0); dns_name_init(&name1, NULL); dns_name_init(&name2, NULL); dns_rdata_toregion(rdata1, ®ion1); dns_rdata_toregion(rdata2, ®ion2); dns_name_fromregion(&name1, ®ion1); dns_name_fromregion(&name2, ®ion2); return (dns_name_rdatacompare(&name1, &name2)); } static isc_result_t fromstruct_cname(ARGS_FROMSTRUCT) { dns_rdata_cname_t *cname = source; isc_region_t region; REQUIRE(type == dns_rdatatype_cname); REQUIRE(cname != NULL); REQUIRE(cname->common.rdtype == type); REQUIRE(cname->common.rdclass == rdclass); UNUSED(type); UNUSED(rdclass); dns_name_toregion(&cname->cname, ®ion); return (isc_buffer_copyregion(target, ®ion)); } static isc_result_t tostruct_cname(ARGS_TOSTRUCT) { isc_region_t region; dns_rdata_cname_t *cname = target; dns_name_t name; REQUIRE(rdata->type == dns_rdatatype_cname); REQUIRE(cname != NULL); REQUIRE(rdata->length != 0); cname->common.rdclass = rdata->rdclass; cname->common.rdtype = rdata->type; ISC_LINK_INIT(&cname->common, link); dns_name_init(&name, NULL); dns_rdata_toregion(rdata, ®ion); dns_name_fromregion(&name, ®ion); dns_name_init(&cname->cname, NULL); name_duporclone(&name, mctx, &cname->cname); cname->mctx = mctx; return (ISC_R_SUCCESS); } static void freestruct_cname(ARGS_FREESTRUCT) { dns_rdata_cname_t *cname = source; REQUIRE(cname != NULL); if (cname->mctx == NULL) { return; } dns_name_free(&cname->cname, cname->mctx); cname->mctx = NULL; } static isc_result_t additionaldata_cname(ARGS_ADDLDATA) { UNUSED(rdata); UNUSED(owner); UNUSED(add); UNUSED(arg); REQUIRE(rdata->type == dns_rdatatype_cname); return (ISC_R_SUCCESS); } static isc_result_t digest_cname(ARGS_DIGEST) { isc_region_t r; dns_name_t name; REQUIRE(rdata->type == dns_rdatatype_cname); dns_rdata_toregion(rdata, &r); dns_name_init(&name, NULL); dns_name_fromregion(&name, &r); return (dns_name_digest(&name, digest, arg)); } static bool checkowner_cname(ARGS_CHECKOWNER) { REQUIRE(type == dns_rdatatype_cname); UNUSED(name); UNUSED(type); UNUSED(rdclass); UNUSED(wildcard); return (true); } static bool checknames_cname(ARGS_CHECKNAMES) { REQUIRE(rdata->type == dns_rdatatype_cname); UNUSED(rdata); UNUSED(owner); UNUSED(bad); return (true); } static int casecompare_cname(ARGS_COMPARE) { return (compare_cname(rdata1, rdata2)); } #endif /* RDATA_GENERIC_CNAME_5_C */